1921136914 has 4 divisors (see below), whose sum is σ = 2881705374. Its totient is φ = 960568456.

The previous prime is 1921136897. The next prime is 1921136927. The reversal of 1921136914 is 4196311291.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1862354025 + 58782889 = 43155^2 + 7667^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480284227 + ... + 480284230.

Almost surely, 2^1921136914 is an apocalyptic number.

1921136914 is a deficient number, since it is larger than the sum of its proper divisors (960568460).

1921136914 is an equidigital number, since it uses as much as digits as its factorization.

1921136914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960568459.

The product of its digits is 11664, while the sum is 37.

The square root of 1921136914 is about 43830.7758772304. The cubic root of 1921136914 is about 1243.1382773182.

The spelling of 1921136914 in words is "one billion, nine hundred twenty-one million, one hundred thirty-six thousand, nine hundred fourteen".